非遗传因素对中国美利奴羊(新疆型)主要经济性状的影响

doi:10.16431/j.cnki.1671-7236.2018.06.023

Abstract

Abstract:

To explore the effect of non-genetic factors on main economic traits in Chinese Merino sheep (Xinjiang type),a statistical analysis was made on the identification records of one year old ewe in 19 years from 1992 to 2010.The effect of three non-genetic factors (birth years,groups and birth months) on the six subjective traits (capilli score,wool density score,wool bending score,wool fineness score,body condition score and breed grade score) and four objective traits (wool staple length,evalution weight,clean fleece weight and greasy fleece weight) of the identification records of one year old ewe was studied using the least square analysis of variance.The results showed that birth years and groups had extremely significant effect on the 10 economic traits (P<0.01).Except the wool density score,wool fineness score and breed grade score,birth months had extremely significant effect on the other 7 economic traits (P<0.01).According to the 3 main traits (wool fineness score,wool staple length and greasy fleece weigh),the wool fineness score in 2008 was the highest and significantly higher than that in 2006, 2007 and 2010 (P<0.05);The wool staple length in 1996 was the highest and significantly higher than that in 1994,2002,2004,2006,2007,2008 and 2010 (P<0.05),and had no significant difference with 1995,2003 and 2009 (P>0.05);The greasy fleece weight in 1995 was the highest and significantly higher than that in 1994 and 2009 (P<0.05),and had no significant difference with 1992 (P>0.05).In addition,wool fineness score,wool staple length and greasy fleece weigh in other years were extremely significantly lower than the highest (P<0.01).Except group 2,different groups had advantages.Sheep born in January and February were better than that in March and April.It could be seen that the non-genetic factors of birth years,groups and birth months had significant influence on the main economic traits of Chinese Merino sheep (Xinjiang type).Therefore,these factors should be taken into account in the estimation of genetic parameters and genetic assessment,and it provided more reliable data references and laid theoretical basis for obtaining more comprehensive and accurate breeding value and breeding program.

Key words: Chinese Merino sheep (Xinjiang type); non-genetic factor; economic traits

CLC Number:

S826.8⁺6

HOU Fang, ZANG Changjiang, WANG Lianqun, ZHAO Bingru, AIZEZI·Simayi, KAHAER·Kadier, HUANG Xixia, TIAN Kechuan. Effect of Non-genetic Factors on Main Economic Traits in Chinese Merino Sheep Chinese Merino Sheep (Xinjiang Type)[J]. , 2018, 45(6): 1608-1617.

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Effect of Non-genetic Factors on Main Economic Traits in Chinese Merino Sheep Chinese Merino Sheep (Xinjiang Type)

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